For some people, leaving home without a snack feels strangely incomplete. There is a granola bar in the handbag, crackers in the car, nuts in a desk drawer or a small packet of something tucked into a backpack. They may not even expect to eat it. The snack is simply there, just in case. Psychology offers an interesting explanation for this behavior: carrying food can sometimes function as a small form of anticipatory coping, giving people a sense that they have resources available if an uncomfortable situation arises. Research does not establish that carrying snacks automatically signals anxiety or a particular personality type, but theories involving proactive coping, intolerance of uncertainty, perceived control and self-regulation can help explain why having food readily available may feel reassuring.
In other words, the snack may sometimes serve two purposes: satisfying hunger and creating the psychological comfort of knowing that a potential problem has already been handled.